Wikipedia:List of hoaxes on Wikipedia

This is a list of known historical hoaxes on Wikipedia. Its purpose is to document hoaxes on Wikipedia, in order to improve our detection and understanding of them. It is considered a hoax if it was a clear or blatant attempt to make up something, as opposed to libel, vandalism or a factual error. A hoax is considered notable enough for inclusion in this list if it evaded detection for more than one month or was discussed by reliable sourcesin the media. This list is incomplete, as many hoaxes remain undiscovered.

https://en.wikipedia.org/wiki/Wikipedia:List_of_hoaxes_on_Wikipedia